Telephone base unit



FIG. 1 is a perspective view of a telephone base unit showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict unclaimed portions of the telephone base unit, which form no part of the claimed design. 

CLAIM I claim the ornamental design for a telephone base unit, as shown and described. 